Device for draining the cylinders of engines



' (No Model) J. BRISCOE.

DEVICE FOR DRAINING THE GYLINDERSOF ENGINES.

No. 359,767. Patented Mar. 22, 1887 W'ZfiGGeSGS, I JZanfirzlscoe.

n PETERS. Mummy. Wahnwm n c NITED STATES PATENT @rrrcne JOHN BRISCOE, OFCUSTER CITY, PENNSYLVANIA.

DEVICE FOR DRAlNlNG THE CYLINDERS OF-ENGlNES.

SPECIFICATION forming part of Letters Patent No. 359,767, dated March22, 1887.

Application filed August D, 1886. Serial X0. 210.457. (N0 model.)

To all 2071 0722, it may concern:

Be it known that l, J OHN BRISCOE, a citizen of the United States,residing at Custer City, in the county of McKean and State of.Pennsylvania, have invented new and useful In1- provenicnts in Devicesfor Draining the Cylinders of Engines, of which the following is aspecification.

In order to drain the cylinders of engines by discharging the water ofcondensation from the exhausting end, and at the same time pre ventwaste of steam at the receiving end, of the cylinder, variouscontrivances have been employed-such, for example, as a barrel or shellcommunicating wit-h both ends of the cylinder by pipes, andreciprocating rigidlyconnected valves housed in the shell andoperatingautomatically, in order that the closure of one valve,consequent upon the pressure of steam against it, would open the othervalve, and thereby drain the exhaust end of the cyl indcr. Other deviceshave been adoptersuch as loosely-coupled reciprocating valves in a shellor case having valve-seats and suit able means of discharge.

The connected valves have also been provided with a spring so arrangedas to automatically rnovc both valves from their seats when the steam iscut off from the cylinder, thereby draining both ends of the cylinderwhile the engine is at rest.

The object of my invention is to provide an improved means ofautomatically opening the two valves when the engine stops; and itconsists in the combination, with a shell or case having a suitabledrainage-outlet and two valves seating against opposite ends or sides ofthe shell, of a spring engaged with the valvestcm between the valves andprovided at its attaching end with a screw-plug, by which it isdetachabl y secured to the shell, and whereby the two valves areautomatically moved from their seats when steam is cut off from thecylinder of the engine, to permit both ends of the cylinder to drainwhile the engine is not in operation.

The invent-ion is illustrated in the accompanying drawings, in which-Figure 1 is a central sectional view of a check and relief valveembodying my invention; Fig. 2, a section of the valve stem taken on theline a: x of Fig. 1, and Fig. 3 a

detail view of the device for automatically opening the two valves whensteam is cut off from the cylinder of the engine.

In order to enable those skilled in the art to make and use myinvention, I will now describe the same in detail, referring to thedrawings, where The numeral 1 indicates a shell or case having at eachend a scrcwthrcad, 2, for connecting, bysuitable pipes, 3, withthe'oppositc ends of the cylinder of an engine or pump. The shell inpractice will be located cent-rally be tween the ends of the cylinder,although this is not deemed essential. The center of the shell isprovided with a screw-neck, 4, for connecting with a pipe, 5, toconstitute-a drainageoutlct, and each end of the shell is provided witha valve-seat, 6, on which alternately seat the valve-disks 7, which areconnected by a stem, 8, passing centrally through the shell. One ofthese valves is preferably formed with or permanently secured to one endof the stem, while the other end of the latter is screwthreaded, as at9, the valve at this end being secured by a shoulder, 10, and ascrew-nut, 11. The valve-stem at or near the middle of its length isslotted, notched, or recessed, as at 12, and with the same looselyengages one end of a fiat or other shaped steel spring, 13,'which, ashere shown, forms part of or is attached to a screw-plug, 14, vengaginga screw-socket, 15, in one side of the shell and looked in place by ascrew-nut, 16. The valve-stem is winged adjacent to each end, as at 17,such wings guiding the stem in the shell and aifording passages for theentrance of drainage into the shell to the drainage-outlet.

In operation the valves travel in harmony with the piston of thecylinder, and when steam enters at one end of the latter the valvecorresponding to that end will be seated, thus checking the escape ofthe live steam, and at the same time moving the opposite valve from itsseat, and thus holding it until the piston makes its stroke, therebyrelieving the exhaust end of the cylinder from condensed steam or waterwhich passes through the opened valve to the drainage-outlet.

When the engine is in operation, one or the other of the valves isalways seated, thereby placing the spring under tension, andconsequently when steam is cut off from the cylinder and pressure on theclosed valve relieved the spring assumes its straight position, Fig. 3,thereby moving the valve-stem just a sufficient distance to unseat bothvalves. In this position of the valves both ends of the cylinder aredrained while the engine is not in operation, and this is accomplishedautomatically, so that the engineer is not under the necessity ofoperating the valves in starting or stopping the engine.

I am aware that a spring for automatically unseating the connecteddrainage-valves of an engine or pump cylinder when the engine or pump isat rest has hitherto been provided and arranged in several ways; but Iam not aware that such spring has been provided with a screw-plug fordetachable connection with an opening in the valve-ease, and wherebysaid spring can be adjusted from the outside of the Having thusdescribed my invention, what In testimony whereof I aflix my signaturein.

presence of two witnesses.

JOHN BRISOOE.

\Vitnesscs:

O. E. Jenn, JNo. B. CHAPMAN.

